CN214769509U - Anchor clamps that top hammer mould undershot was processed and is made - Google Patents

Abstract

The utility model discloses an anchor clamps of manufacturing are punched under top hammer mould, including bottom plate, backing plate and the fastening block that reciprocates, the fastening block is connected and is being punched down, be equipped with the screw hole that is used for connecting bolt in the fastening block, be equipped with the installation on the bottom plate the mounting hole of bolt, the fastening block passes through the bolt setting on the bottom plate, and the backing plate setting leaves the clearance between fastening block and the backing plate under punching and the bottom plate, and the extrusion force that the punching was passed through between punching and the backing plate under punching is fixed. The utility model reduces the structure of the process head and the waste of raw materials; the working procedures of processing the process head and the conical sleeve are reduced, and the processing cost and the processing time are saved; the clamping is stable and reliable, double-tip top grinding is adopted when the conical surface is machined, the conical surface can be dismounted from a machine tool at any time in the process, and the clearance between the conical surface and a female die is convenient to realize; the clamp can be repeatedly used, and the punching universality of the top hammer dies with different specifications is good; when the middle square hole and the conical surface are machined, secondary clamping is not needed, the operation is convenient and fast, and the machining precision is high.

Description

Anchor clamps that top hammer mould undershot was processed and is made

Technical Field

The utility model belongs to the technical field of the mould manufacturing technique and specifically relates to a anchor clamps of manufacturing are punched under top hammer mould is related to.

Background

The hard alloy is an alloy material prepared by a powder metallurgy process from a hard compound of refractory metals and bonding metals, and has the characteristics of high hardness, and good hot hardness, wear resistance and corrosion resistance. In the superhard material synthesis industry, the hard alloy anvil is a key component of an ultrahigh pressure high temperature device for synthesizing the artificial diamond by a static pressure method, and the hard alloy anvil is made of hard alloy, so that the hard alloy anvil has high strength, good wear resistance, toughness and thermal stability. At present, when a top hammer die is punched under a machined conical surface, a four-jaw chuck is usually adopted for clamping or a process head is additionally arranged for clamping; the four-jaw chuck clamping is divided into four equal parts due to the fact that the anvil punches downwards, clamping stability and operation difficulty are high, and serious consequences such as product scrappage casualties and the like can be caused by looseness and falling in an careless processing process; the manufacturing of the process head causes serious material waste, the material utilization rate is less than 60%, and the process is complicated and can be realized only by adding an additional processing procedure aiming at the process head.

For example, the publication No. CN104057269A of "a process for machining a punch of a hard alloy anvil forming die" disclosed in the chinese patent document includes a metal cutting process, a heat treatment process, a pliers processing process and an electric discharge machining process, wherein an auxiliary workpiece taper sleeve and a jacket are provided in the process of machining the punch, four blocks of the punch machined by the process have the same height, the same angle of the inclined plane and the tight seam after the blocks are spliced, thereby eliminating the occurrence of the tilting phenomenon of the blocks. The process head is manufactured by adding the process head and the conical sleeve to process the conical surface and the square inner hole, so that the material waste is serious, the material utilization rate is less than 60 percent, and the process is complicated and can be realized by adding an additional processing procedure aiming at the process head; when the lower punch is cut into four pieces, a process head is required to be linearly cut, so that the processing efficiency of linear cutting is reduced and the processing cost is increased; the universality of the process head and the conical sleeve is poor, and the conical sleeve needs to be manufactured again every time the size of the undershoot is changed, thereby causing waste and low efficiency; when the lower conical surface is processed, the lower conical surface is matched with a female die, and a process head and a conical sleeve structure are adopted, so that real-time matching cannot be realized; after the process head is removed by punching, the die cannot be repaired, so that resource waste is caused, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the unstable problem of clamping of prior art, provide an anchor clamps that manufacturing was gone down to top hammer mould, simple structure can dismantle, applicable clamping that goes down in multiple size top hammer mould.

The utility model also overcomes the problems that the prior art needs to manufacture a process head for processing the conical surface, which causes serious material waste, low material utilization rate and complex process and needs to add an additional processing procedure aiming at the process head; the clamp has poor universality; after the process head is removed, the lower punch cannot be repaired; when the middle square hole is cut by the wire, the process head needs to be cut firstly, and the outer taper sleeve is loosened; the fixture for lower punching processing and manufacturing of the anvil die is provided, a process head is omitted, unnecessary processing procedures are reduced, the utilization rate of materials is greatly improved, processing of the conical surface and linear cutting of the inner hole are completed on the same fixture, only one-time clamping is needed, and the processing precision is guaranteed; undershoot simple to operate just is applicable to the undershoot of a plurality of sizes, and the commonality is good.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an anchor clamps of manufacturing under top hammer mould punching, includes bottom plate, backing plate and the fastening block that reciprocates, the fastening block is connected and is being dashed down, be equipped with the screw hole that is used for connecting bolt in the fastening block, be equipped with the installation on the bottom plate the mounting hole of bolt, the fastening block passes through the bolt setting on the bottom plate, the backing plate sets up under between punch and bottom plate, leaves the clearance between fastening block and the backing plate, and the extrusion force that the lower punch was between through lower punch and the backing plate is fixed.

The sliding connection limits the up-down, left-right movement of the down punch, and after the down punch is well positioned, the down punch is fixed through extrusion force and generated friction force. The upper end of the fastening block is connected with the lower punch, the lower end of the fastening block is fixed through the bolt, the fastening block can move downwards due to a gap between the fastening block and the base plate, when the bolt is screwed down, the fastening block moves downwards under the driving of the bolt, the fastening block drives the lower punch to move downwards, and the base plate is arranged between the lower punch and the bottom plate, so that the lower punch moves downwards and extrudes with the cushion block, and the more the bolt is screwed down, the larger the generated extrusion force is, the firmer the lower punch is fixed; when the conical surface is machined, the lower punch is contracted inwards by the force generated by cutting of the cutter, the higher the extrusion force between the lower punch and the base plate is, the higher the friction force between the lower punch and the base plate is, and the lower punch is prevented from being contracted inwards; compare in traditional addding technology head and process the conical surface, the technology head structure has been reduced, during the unloading according to actual height reserve get necessary machining allowance can, raw and other materials waste has been reduced, the process of rough turning technology head end has been reduced, generally adopt the round steel to get the material when combining actual unloading, when current rough turning technology head end excircle, for the clamping needs, the turning allowance is very big, and still need carry out the correct grinding to technology head department excircle after the thermal treatment, this fixed approach has reduced this process processing, can save processing cost and process time.

Preferably, the number of the fastening blocks is 4, dovetail guide rails are arranged at the upper ends of the fastening blocks, dovetail sliding grooves matched with the dovetail guide rails are formed in the lower end faces of the lower punches, the single punches of the lower punches are symmetrical left and right along the dovetail sliding grooves, and every two adjacent dovetail guide rails are perpendicular to each other. The fastening block and the lower punch are connected in a sliding mode through the dovetail guide rail and the dovetail sliding groove, the dovetail shape enables the contact area of the fastening block and the lower punch to be larger, the connection is more stable, and the fastening effect is better; a single punch is arranged in the middle of the punch along the dovetail-shaped sliding groove bilateral symmetry surface sliding grooves, the four dovetail guide rails are perpendicular to each other, the accuracy and the positive direction of the direction during installation of the lower punch are guaranteed, the four lower punches slide in along the dovetail guide rails simultaneously, when the left cutting surface and the right cutting surface of the lower punch are tightly attached to the cutting surfaces of the adjacent punches, installation completion is indicated, and the intersection point of the extension lines of the dovetail guide rails is the center point of the lower punch.

Preferably, the surface of the dovetail guide rail is provided with anti-slip patterns. When extrusion takes place for forked tail guide rail and swallow-tail form spout, the frictional force between improvement forked tail guide rail that antiskid decorative pattern can be great and the swallow-tail form spout prevents to dash down and removes, has further improved down the stability of punching fixed clamping.

Preferably, the lower punch locking mechanism further comprises a mandrel and a locking nut, the mandrel is in a step shape, the upper section of the mandrel is provided with threads, the lower section of the mandrel is tightly attached to the lower surface of the lower punch, and the lower punch is locked through the matching of the locking nut and the mandrel; the bottom plate and the base plate are respectively provided with a through hole for inserting the mandrel, and the lower section of the mandrel is matched in the through hole. The mandrel is in a step shape, the upper surface of the lower section of the mandrel is tightly attached to the lower surface of the lower punch, the upper section of the mandrel is in threaded connection with the fastening nut, the fastening nut compresses the lower punch, the lower punch is locked through the matching of the mandrel and the fastening nut, when the lower punch conical surface is machined, the two ends of the mandrel can be jacked on the top of a machining lathe to conduct conical surface machining, a process head is omitted, compared with a clamp for clamping the outer circle of the lower punch to conduct conical surface machining, the coaxiality of double-top grinding machining of the mandrel is better, and the precision of the machined conical surface is higher.

Preferably, the backing plate is further provided with a square hole for mounting the fastening block.

Preferably, the backing plate and the bottom plate are both circular rings, and the outer diameters of the backing plate and the bottom plate are the same.

Preferably, each fastening block is provided with two threaded holes. The connection of the fastening block is more stable, and the pulling force exerted on the fastening block is more uniform.

Therefore, the utility model discloses following beneficial effect has: (1) the process head structure is reduced, so that necessary processing allowance is reserved according to the actual height during blanking, and the waste of raw materials is reduced; (2) the working procedures of processing the process head and the conical sleeve are reduced, and the processing cost and the processing time are saved; (3) the clamping is stable and reliable, double-tip top grinding is adopted when the conical surface is machined, the conical surface can be dismounted from a machine tool at any time in the process, and the clearance between the conical surface and a female die is convenient to realize; (4) the clamp can be repeatedly used, and the punching universality of the top hammer dies with different specifications is good; (5) when the middle square hole and the conical surface are machined, secondary clamping is not needed, the operation is convenient and fast, and the machining precision is high.

Drawings

FIG. 1 is a schematic view of the structure of example 1;

FIG. 2 is a schematic view of the structure of example 2;

fig. 3 is a schematic structural diagram of a top view of the present invention;

fig. 4 is a schematic structural view of the backing plate of the present invention;

fig. 5 is a schematic structural diagram of the bottom plate of the present invention;

FIG. 6 is a schematic structural view of the fastening block of the present invention;

FIG. 7 is a schematic top view of the structure of FIG. 6;

fig. 8 is a schematic view of a mandrel according to the present invention;

fig. 9 is a schematic view of a construction of the lock nut of the present invention.

In the figure: 1. the device comprises a lower punch 2, a fastening block 3, a backing plate 4, a bottom plate 5, a conical surface 6, a reference surface 7, a dovetail-shaped sliding groove 8, a bolt 9, a tool withdrawal groove 10, a mandrel 11, a locking nut 12, a square hole 13, a through hole 14, a mounting hole 15, a dovetail guide rail 16, a threaded hole 17, a lower section 18, an upper section 19, a threading hole 20, a middle square hole 22 of a base line 21, an upper end surface 23 of a step and a lower end surface of the step.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment 1 shown in fig. 1, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, the utility model discloses a clamp for manufacturing lower punch of top hammer die, including bottom plate 4, backing plate 3 and fastening block 2, fastening block and lower punch 1 sliding connection, the lower punch is fixed through the extrusion force between lower punch and the backing plate. The lower punch consists of 4 punches, and each punch is connected with a fastening block in a sliding mode.

A threaded hole 16 for connecting a bolt is formed in the fastening block, a mounting hole 14 for mounting the bolt is formed in the bottom plate, the fastening block is arranged on the bottom plate through a bolt 8, the base plate is arranged between the lower punch and the bottom plate, and a gap is reserved between the fastening block and the base plate; the number of the fastening blocks is 4, dovetail guide rails 15 are arranged at the upper ends of the fastening blocks, dovetail sliding grooves 7 matched with the dovetail guide rails are formed in the lower end faces of the lower punches, the single punches of the lower punches are bilaterally symmetrical along the dovetail sliding grooves, and every two adjacent dovetail guide rails are perpendicular to each other;

as shown in fig. 4, the backing plate is further provided with a square hole 12 for mounting a fastening block; the backing plate and the bottom plate are both circular rings, and the outer diameters of the backing plate and the bottom plate are the same; the mounting hole is a stepped hole, and during mounting, the end face of the bolt abuts against the stepped face of the mounting hole; as shown in fig. 6, each fastening block is provided with two threaded holes, the fastening block is a cuboid with a dovetail guide rail at the upper end, the two threaded holes are arranged in parallel along the length direction of the dovetail guide rail, and the threaded holes are located on the left-right symmetrical axis of the fastening block; the bottom plate and the backing plate are both in a circular ring shape, the diameter of the inner ring of the circular ring is larger than that of the square hole which is arranged downwards, so that the middle square hole 21 is not required to be disassembled when being processed, and the whole clamp is more stable to rotate when the conical surface 5 is processed; the diameters of the bottom plate and the base plate are smaller than the diameter of the lower end face of the lower punch after clamping.

Firstly, placing the fastening block into a square hole of the base plate, aligning the down-thrust dovetail-shaped sliding groove to the dovetail guide rail and sliding in, aligning the bolt mounting hole on the bottom plate to the threaded hole of the fastening block, adjusting and fixing the down-thrust by using a bolt, and tightly attaching the upper surface of the base plate to the lower end surface 23 of the down-thrust step; when the lower punch needs to be taken out, the bolt is loosened, and at the moment, the lower punch and the base plate are not squeezed any more, so that the lower punch is taken out.

Processing a conical surface: the lower punch with the clamp is clamped through the chuck to process the conical surface, and the clamp ensures the stability of the lower punch in the cutting process and prevents the lower punch from loosening and falling.

Example 2

The utility model discloses an anchor clamps of top hammer die lower punch manufacturing, including bottom plate 4, backing plate 5 and fastening block 2, 1 sliding connection is down followed with to the fastening block, and it is fixed that the extrusion force between punch and the backing plate is down followed through to the lower punch. The lower punch consists of 4 punches, and each punch is connected with a fastening block in a sliding mode.

As shown in fig. 2, 3, 5, 6 and 7, a threaded hole for connecting a bolt is formed in the fastening block, a mounting hole for mounting the bolt is formed in the bottom plate, the fastening block is arranged on the bottom plate through a bolt 8, the backing plate is arranged between the lower punch and the bottom plate, and a gap is reserved between the fastening block and the backing plate; the number of the fastening blocks is 4, dovetail guide rails 15 are arranged at the upper ends of the fastening blocks, dovetail sliding grooves 7 matched with the dovetail guide rails are formed in the lower end faces of the lower punches, the single punches of the lower punches are bilaterally symmetrical along the dovetail sliding grooves, and every two adjacent dovetail guide rails are perpendicular to each other;

as shown in fig. 4, the backing plate is further provided with a square hole 12 for mounting a fastening block; the backing plate and the bottom plate are both circular rings, and the outer diameters of the backing plate and the bottom plate are the same; as shown in fig. 5, the mounting hole is a stepped hole, and when the bolt is mounted, the end face of the bolt abuts against the stepped surface of the mounting hole; as shown in fig. 6 and 7, each fastening block is provided with two threaded holes 16, the fastening block is a cuboid with a dovetail guide rail at the upper end, the two threaded holes are arranged in parallel along the length direction of the dovetail guide rail, and the threaded holes are located on the left-right symmetrical axis of the fastening block; the bottom plate and the backing plate are both circular rings, so that when the conical surface is machined, the whole clamp rotates more stably.

As shown in fig. 8 and 9, the lower punch locking device further comprises a mandrel 10 and a lock nut 11, wherein the mandrel is in a step shape, the upper section 18 of the mandrel is provided with threads, the lower section 17 of the mandrel is tightly attached to the lower surface of the lower punch, and the lower punch is locked by the cooperation of the lock nut and the mandrel; through holes 13 for inserting the mandrels are formed in the bottom plate and the base plate, and the lower sections of the mandrels are matched in the through holes. The mandrel is divided into three sections in a step shape, the lower section of the mandrel, namely the section with the larger diameter of the mandrel, penetrates through the through holes of the base plate and the base plate, the lower section of the mandrel is matched in the through holes, the coaxiality of the mandrel, the circular base plate and the base plate is guaranteed, the middle section of the mandrel is arranged in the inner hole of the lower punch, the upper section of the mandrel extends out of the inner hole of the lower punch and is provided with threads, and the lower punch is locked through the extrusion of the locking nut and the lower section of the mandrel.

Processing a conical surface: the two ends of the mandrel are jacked on the top of a machining lathe to process the conical surface 5, the coaxiality of the mandrel processed by double-top grinding is better, the precision of the processed conical surface is higher, and the fixture ensures the stability of undershoot in the cutting process and prevents the undershoot from loosening and falling.

A machining process for the down punch of the top hammer die using the clamp in embodiment 2 comprises a metal cutting machining process, a heat treatment process, a clamp machining process and an electric spark machining process, wherein a main body of the down punch is composed of four punches which form 90 degrees with each other, an outer conical surface of the down punch forms an angle theta inclination with the vertical direction and is arranged in clearance fit with a female die, the clamp in embodiment 1 is arranged in the machining process of the down punch, and the machining process specifically comprises the following steps:

blanking:

a. in the blanking stage, Cr12 steel is selected as a blanking raw material; the Cr12 steel is widely used for processing and manufacturing undershoot due to high strength, excellent hardenability and wear resistance.

Metal cutting and clamping before the heat treatment process:

b. the machining allowance of the material is aligned, one end of the blank making raw material is subjected to finish turning machining to form an excircle, the rest part is subjected to light exposure as long as possible, the excircle is turned and clamped, the two-point jumping of the excircle of the aligned light exposure part is less than 0.02, and the blank making raw material is subjected to rough turning machining to form a lower punch, which comprises an outer conical surface 5, a step upper end surface 22, a step lower end surface 23, a tool withdrawal groove 9 of the step upper end surface and a lower punch.

c. Two reference surfaces are finely milled on the excircle, the two reference surfaces are mutually kept to 90 degrees +/-3', clamping can be carried out through a three-jaw chuck, and fine milling is carried out after the excircle 12 is aligned.

The heat treatment process comprises the following steps:

e. the heat treatment process comprises the working procedures of annealing, quenching and tempering. The annealing temperature was 870 ℃, and as an embodiment, the annealing process was carried out by placing the punch 5 in a cold furnace, maintaining the temperature at 400 ℃ and 650 ℃ for 30 minutes, raising the temperature to the annealing temperature, and then maintaining the temperature at 0.8 min/1 mm. The annealing process is carried out to fully prepare for quenching, eliminate the internal stress generated in the cutting process, reduce the hardness and refine the tissue and make the components uniform. The quenching temperature is HRC 55-58, the quenching temperature is 950-980 ℃, and oil cooling is adopted. The tempering is 200-220 ℃, and in order to fully reduce brittleness caused by quenching and eliminate or greatly reduce internal stress, the tempering time is not less than 12 hours.

Metal cutting, clamping and electric spark machining after the heat treatment process:

f. and matching a core shaft, aligning two-point runout of the outer conical surface to be less than 0.05mm, and exposing the outer conical surface to light. For fine grinding of upper and lower step surfacesBefore grinding the step surface and exposing light, the outer cone and the maximum excircle runout must be detected to be less than 0.01mm, the upper and lower end surfaces are impacted to expose light during flat grinding,/. less than or equal to 0.02mm, and the lower end surface of the step□ ≤0.01mm。

g. And a dovetail-shaped sliding groove 7 for installing the clamp is cut on the lower end face of the step through wire electrical discharge machining.

h. The spark-piercing forming process produces four symmetrical wire feed holes 19 in the base wire 20 for cutting the lower punch near the outer circle.

i. The datum plane is aligned, the runout is smaller than 0.01mm, the base line is punched to penetrate through the wire-passing hole through wire-cut electrical discharge machining without cutting, after four punches are formed under cutting, the remaining allowance can be selected to be 6-10 mm of the gap between the wire-passing hole and the excircle, the middle square hole is cut, the single variable is kept for 1mm, and then cutting is carried out along the wire-passing hole.

j. And grinding the lower punched cut surface. And (4) grinding the flat plate, finishing burrs and external salient points at the joint, and detecting to meet the size requirement.

k. And (3) simultaneously installing the ground lower punch to the clamp through the dovetail-shaped sliding groove, fixing the lower punch by using the adjusting bolt after the lower punch is spliced, inserting the core shaft, and screwing the locking nut to fix the lower punch.

Aligning and cutting four lower punches, jacking two ends of a mandrel on a top of a processing lathe for conical surface processing, carrying out top grinding processing by adopting a mandrel double-top, and carrying out fine grinding processing on an external conical surface, an upper end surface of a step and a lower end surface of the step, wherein the external conical surface is in clearance fit with a female die. The outer conical surface processed by the fine grinding has more than 90 percent of matching molded surface with the concave die.

And m, taking down the mandrel and the locknut, and machining the middle square hole 21 to the size by wire cut electrical discharge machining.

And n, marking the sequence numbers of the two surfaces of the lower punch joint, dismounting the lower punch from the clamp, and grinding the joint and the middle square hole.

And o, clamping the lower step on a jaw of the precision flat tongs, and performing linear cutting to process the angle forming size of the lower step.

p. polishing the angle-forming bevel under the punch.

Claims (7)

1. The utility model provides an anchor clamps of manufacturing under top hammer mould punching, characterized by, includes bottom plate, backing plate and the fastening block that reciprocates, the fastening block is connected and is being dashed down, be equipped with the screw hole that is used for connecting bolt in the fastening block, be equipped with the installation on the bottom plate the mounting hole of bolt, the fastening block passes through the bolt setting on the bottom plate, the backing plate sets up under between punch and bottom plate, leaves the clearance between fastening block and the backing plate, and the extrusion force that the punch was between through down and the backing plate is fixed down.

2. The fixture for manufacturing the lower punch of the top hammer die as claimed in claim 1, wherein the number of the fastening blocks is 4, the upper end of each fastening block is provided with a dovetail guide rail, the lower end face of each lower punch is provided with a dovetail sliding groove matched with the dovetail guide rail, the single punches of the lower punches are symmetrical left and right along the dovetail sliding grooves, and every two adjacent dovetail guide rails are perpendicular to each other.

3. The holding jig for downward punching of a hammer punch according to claim 2, wherein the dovetail guide rail has an anti-slip pattern on its surface.

4. The holding fixture for the lower punch machining of the top hammer die as claimed in claim 2, further comprising a mandrel and a locking nut, wherein the mandrel is stepped, the upper section of the mandrel is provided with threads, the lower section of the mandrel is tightly attached to the lower surface of the lower punch, and the lower punch is locked by the locking nut and the mandrel in a matching manner; the bottom plate and the base plate are respectively provided with a through hole for inserting the mandrel, and the lower section of the mandrel is matched in the through hole.

5. The holding jig for lower punch manufacturing of a top hammer die as claimed in claim 2, wherein said backing plate is further provided with a square hole for mounting a fastening block.

6. The holding fixture for lower punch machining of top hammer mold as claimed in claim 4, wherein the backing plate and the bottom plate are circular ring-shaped, and the outer diameters of the backing plate and the bottom plate are the same.

7. The hammer die down punch manufacturing fixture of claim 1, wherein each fastening block has two threaded holes.

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